powerpc/ppc4xx_hsta_msi: Move MSI-related ops to pci_controller_ops

Move the ppc4xx hsta msi subsystem to use the pci_controller_ops
structure rather than ppc_md for MSI related PCI controller
operations.

As with fsl_msi, operations are plugged in at the subsys level, after
controller creation. Again, we iterate over all controllers and
populate them with the MSI ops.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/sysdev/ppc4xx_hsta_msi.c

@@ -128,6 +128,7 @@ static int hsta_msi_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct resource *mem;
 	int irq, ret, irq_count;
+	struct pci_controller *phb;
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (IS_ERR(mem)) {
@@ -171,8 +172,10 @@ static int hsta_msi_probe(struct platform_device *pdev)
 		}
 	}
 
-	ppc_md.setup_msi_irqs = hsta_setup_msi_irqs;
-	ppc_md.teardown_msi_irqs = hsta_teardown_msi_irqs;
+	list_for_each_entry(phb, &hose_list, list_node) {
+		phb->controller_ops.setup_msi_irqs = hsta_setup_msi_irqs;
+		phb->controller_ops.teardown_msi_irqs = hsta_teardown_msi_irqs;
+	}
 	return 0;
 
 out2: